JP2010225279A5 - - Google Patents

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Publication number
JP2010225279A5
JP2010225279A5 JP2010134356A JP2010134356A JP2010225279A5 JP 2010225279 A5 JP2010225279 A5 JP 2010225279A5 JP 2010134356 A JP2010134356 A JP 2010134356A JP 2010134356 A JP2010134356 A JP 2010134356A JP 2010225279 A5 JP2010225279 A5 JP 2010225279A5
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JP
Japan
Prior art keywords
reproduction
less
information recording
marks
spaces
Prior art date
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Application number
JP2010134356A
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Japanese (ja)
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JP4938108B2 (en
JP2010225279A (en
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Publication date
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Priority to JP2010134356A priority Critical patent/JP4938108B2/en
Priority claimed from JP2010134356A external-priority patent/JP4938108B2/en
Publication of JP2010225279A publication Critical patent/JP2010225279A/en
Publication of JP2010225279A5 publication Critical patent/JP2010225279A5/ja
Application granted granted Critical
Publication of JP4938108B2 publication Critical patent/JP4938108B2/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Claims (1)

光情報記録媒体のＲＬＬ（１，７）変調方式によって、記録情報が、複数の長さを有するマークおよびスペースとして形成されるとともに、前記複数の長さを有するマークおよびスペースのうちの、２Ｔマークならびに２Ｔスペースの長さが０．１２μｍよりも短く形成される情報記録層に対して、
開口数０．８４以上かつ０．８６以下の対物レンズを介して波長４００ｎｍ以上かつ４１０ｎｍ以下の再生光を、０．８ｍＷ以上かつ２．４ｍＷ以下のパワーで照射し、
照射することで得られる反射光の強度を信号として再生する再生方法であって、
再生時に、ＰＲＭＬ復号において理想波形と近づけるために用いる係数を、ＬＭＳアルゴリズムを用いて更新し、ＰＲ（１２２２１）ＭＬ方式にて復号することを特徴とする光情報記録媒体再生方法。 Recording information is formed as marks and spaces having a plurality of lengths by the RLL (1, 7) modulation method of the optical information recording medium, and the 2T mark among the marks and spaces having the plurality of lengths. and for the information recording layer length of 2T space is shorter than 0.12 .mu.m,
Irradiation of reproduction light having a wavelength of 400 nm or more and 410 nm or less through an objective lens having a numerical aperture of 0.84 or more and 0.86 or less with a power of 0.8 mW or more and 2.4 mW or less,
A reproduction method for reproducing the intensity of reflected light obtained by irradiation as a signal ,
A reproduction method of an optical information recording medium, wherein a coefficient used to approximate an ideal waveform in PRML decoding is updated using an LMS algorithm at the time of reproduction, and is decoded by a PR (12221) ML method.
JP2010134356A 2007-06-01 2010-06-11 Optical information recording medium reproduction method Expired - Fee Related JP4938108B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2010134356A JP4938108B2 (en) 2007-06-01 2010-06-11 Optical information recording medium reproduction method

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
JP2007147462 2007-06-01
JP2007147462 2007-06-01
JP2007271698 2007-10-18
JP2007271698 2007-10-18
JP2010134356A JP4938108B2 (en) 2007-06-01 2010-06-11 Optical information recording medium reproduction method

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
JP2009517848A Division JP4938078B2 (en) 2007-06-01 2008-05-30 Optical information recording medium reproduction method

Publications (3)

Publication Number Publication Date
JP2010225279A JP2010225279A (en) 2010-10-07
JP2010225279A5 true JP2010225279A5 (en) 2012-02-16
JP4938108B2 JP4938108B2 (en) 2012-05-23

Family

ID=40093632

Family Applications (7)

Application Number Title Priority Date Filing Date
JP2009517848A Expired - Fee Related JP4938078B2 (en) 2007-06-01 2008-05-30 Optical information recording medium reproduction method
JP2010134358A Expired - Fee Related JP4938110B2 (en) 2007-06-01 2010-06-11 Optical information recording medium and optical information recording medium reproducing method
JP2010134359A Expired - Fee Related JP4938111B2 (en) 2007-06-01 2010-06-11 Optical information recording medium playback device
JP2010134355A Expired - Fee Related JP4938107B2 (en) 2007-06-01 2010-06-11 Optical information recording medium playback device
JP2010134357A Expired - Fee Related JP4938109B2 (en) 2007-06-01 2010-06-11 Optical information recording medium playback device
JP2010134356A Expired - Fee Related JP4938108B2 (en) 2007-06-01 2010-06-11 Optical information recording medium reproduction method
JP2012036772A Expired - Fee Related JP5422009B2 (en) 2007-06-01 2012-02-22 Optical information recording medium

Family Applications Before (5)

Application Number Title Priority Date Filing Date
JP2009517848A Expired - Fee Related JP4938078B2 (en) 2007-06-01 2008-05-30 Optical information recording medium reproduction method
JP2010134358A Expired - Fee Related JP4938110B2 (en) 2007-06-01 2010-06-11 Optical information recording medium and optical information recording medium reproducing method
JP2010134359A Expired - Fee Related JP4938111B2 (en) 2007-06-01 2010-06-11 Optical information recording medium playback device
JP2010134355A Expired - Fee Related JP4938107B2 (en) 2007-06-01 2010-06-11 Optical information recording medium playback device
JP2010134357A Expired - Fee Related JP4938109B2 (en) 2007-06-01 2010-06-11 Optical information recording medium playback device

Family Applications After (1)

Application Number Title Priority Date Filing Date
JP2012036772A Expired - Fee Related JP5422009B2 (en) 2007-06-01 2012-02-22 Optical information recording medium

Country Status (4)

Country Link
US (8) US8189444B2 (en)
EP (6) EP2249338A3 (en)
JP (7) JP4938078B2 (en)
WO (1) WO2008149814A1 (en)

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